CN114517252B - Device for surface modification of micro parts - Google Patents

Device for surface modification of micro parts Download PDF

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Publication number
CN114517252B
CN114517252B CN202210069884.0A CN202210069884A CN114517252B CN 114517252 B CN114517252 B CN 114517252B CN 202210069884 A CN202210069884 A CN 202210069884A CN 114517252 B CN114517252 B CN 114517252B
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China
Prior art keywords
vibrating piece
module
roll
vibrating
working cavity
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CN202210069884.0A
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Chinese (zh)
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CN114517252A (en
Inventor
周王凡
杨宇
任旭东
叶云霞
童照鹏
陈兰
李永健
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Jiangsu University
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Jiangsu University
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Priority to CN202210069884.0A priority Critical patent/CN114517252B/en
Priority to GB2319351.9A priority patent/GB2621965A/en
Priority to PCT/CN2022/073621 priority patent/WO2023137773A1/en
Publication of CN114517252A publication Critical patent/CN114517252A/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/005—Vibratory devices, e.g. for generating abrasive blasts by ultrasonic vibrations

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention provides a device for modifying the surface of a micro part, which comprises a strengthening module, a roll-to-roll vibrating piece module, a water feeding module and a laser module. The strengthening module comprises a shell and shots, a working cavity is arranged in the shell, a movable vibrating piece is arranged in one end of the working cavity, a plurality of shots are uniformly distributed on the vibrating piece, and a workpiece to be strengthened is arranged in the other end of the working cavity; the roll-to-roll vibrating piece module is used for driving the vibrating piece to move; the water delivery module is used for forming a constraint layer on one side of the vibrating piece; the laser module is used for generating laser beams, and the laser beams penetrate through the constraint layer to impact the vibration sheet, so that the vibration sheet generates vibration and is used for providing kinetic energy for the projectile, and the projectile is used for impacting a workpiece to be strengthened to obtain the kinetic energy. The invention utilizes the high-energy nanosecond pulse laser to induce the shock wave to act on the vibrating sheet, the vibrating sheet drives the micro projectile to continuously hammer the surface of the micro part to realize modification treatment, and the device has simple structure and good reliability.

Description

Device for modifying surface of micro part
Technical Field
The invention relates to the field of material surface modification, in particular to a device for modifying the surface of a micro part.
Background
The microminiature mechanical product has application prospect in the fields of biomedicine, aerospace, national defense, high-tech electronic products and the like. Metal tiny parts in miniature mechanical products, such as micro-gears, micro-switches, etc. as main bearings, are subject to alternating loads of heat, force, etc., and are prone to wear and fatigue failure, resulting in product failure. The development of the application of the miniature mechanical product puts higher requirements on the surface quality, the wear resistance, the fatigue resistance and the like of the miniature structural part. In addition, micro-miniature parts used in medicine often require cleaning, fogging, matting, adhesion enhancement, deburring or texturing of surfaces, and the like.
The metal surface strong plastic deformation method can realize the surface modification of the material without introducing other elements, and the interface of the modified layer and the matrix is uniformly transited without the defects of pores, pollution and the like. The surface strong plastic deformation method mainly comprises shot blasting, sand blasting, surface ultrasonic grinding and the like. The method usually adopts large-size pills to hammer the surface of the material, and a single pill can be too large and cannot be suitable for surface modification treatment of micro parts. The laser shock peening technology, also called as laser shot blasting technology, is a high-energy nanosecond pulse laser induced shock wave to modify the surface of a material, generate residual compressive stress and refine the structure, thereby improving the service performance of the material. The laser shock peening technology generally adopts a spot with a millimeter-scale diameter and overlarge single pulse energy; the small-spot laser shock peening technology cannot use a protective layer, has a certain thermal effect, and is not suitable for surface modification treatment of micro parts. The prior art discloses a surface strengthening device based on laser-driven microparticle impact, which utilizes laser-induced plasma to drive a PDMS (polydimethylsiloxane) film to push small particles to impact a target body at a high speed, so that the plastic deformation of the surface of the target is caused, and the surface strengthening treatment is realized. However, strong plastic deformation strengthening of metal surfaces requires that the surface be subjected to accumulated plastic deformation, and a dense strengthening layer cannot be formed on the strengthened surface.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device for modifying the surface of a micro part, which utilizes high-energy nanosecond pulse laser to induce a shock wave to act on a vibrating sheet, the vibrating sheet drives a micro projectile to continuously hammer the surface of the micro part to realize modification treatment, and the device has a simple structure and good reliability.
The present invention achieves the above-described object by the following means.
A device for surface modification of micro parts comprises a strengthening module, a roll-to-roll vibrating piece module, a water supply module and a laser module.
The strengthening module comprises a shell and shots, a working cavity is arranged in the shell, a movable vibrating piece is arranged in one end of the working cavity, a plurality of the shots are uniformly distributed on the vibrating piece, and a workpiece to be strengthened is arranged in the other end of the working cavity; the roll-to-roll vibrating piece module is used for driving the vibrating piece to move; the water delivery module is used for forming a restraint layer on one side of the vibrating piece; the laser module is used for generating laser beams, and the laser beams penetrate through the constraint layer to impact the vibration sheet, so that the vibration sheet generates vibration and is used for providing kinetic energy for the projectile, and the projectile is used for impacting a workpiece to be strengthened to obtain the kinetic energy.
Further, the working cavity is a revolving body, and the moving direction of the vibrating plate is perpendicular to the central axis of the working cavity.
Further, the housing includes an upper cover, a middle housing, and a lower cover; the middle shell is provided with an upper cover and a lower cover at two ends respectively, and the working cavity is a central hole penetrating through the upper cover, the middle shell and the lower cover.
Furthermore, two ends of the workpiece to be strengthened are respectively arranged at the central hole of the upper cover through a first upper gasket and a second upper gasket; the vibrating piece is positioned between the middle shell and the lower cover, and a first lower gasket and a second lower gasket are respectively arranged on two sides of the vibrating piece.
The roll-to-roll vibrating piece module comprises a material discharging roll, a material receiving roll, a material discharging compression roller and a material receiving compression roller, wherein the material discharging compression roller and the material receiving compression roller are positioned at two ends of a vibrating piece and are close to the shell and used for positioning the vibrating piece; the material discharging roll and the material receiving roll are used for enabling the vibrating piece to move.
Furthermore, the water delivery module comprises a spray head, a water pump, a water supply tank and a water collection tank, the water pump is positioned in the water supply tank, the spray head is connected with the water pump, and the spray head is aligned to one side of the vibrating piece, which is far away from the working cavity; the water collecting tank is used for collecting water sprayed by the spray head.
Further, the laser module generates a nanosecond pulse laser beam, the wavelength of the nanosecond pulse laser beam is 1064nm or 532nm, the diameter of a light spot of the nanosecond pulse laser beam is 1-3 mm, the pulse width of the nanosecond pulse laser beam is 10-20 ns, and the pulse energy of the nanosecond pulse laser beam is 5-10J.
Further, the thickness of the vibrating piece is 0.1-0.3 mm, and the movement speed of the vibrating piece is 0.5-5 mm/s.
The invention has the beneficial effects that:
1. the device for modifying the surface of the micro part can realize the adjustment of the speed of the shot by changing the energy of the laser pulse, and has the advantages of large adjustable interval of the speed of the shot and simple operation.
2. The device for modifying the surface of the micro part can use the projectile in any shape, has a closed core area and is good in safety.
3. According to the device for modifying the surface of the micro part, the roll-to-roll discharging module and the water supply module are arranged, so that the laser-induced shock wave pressure is improved, and the vibrating sheet can continuously provide power for micro projectiles, so that automatic processing is realized.
4. The device for modifying the surface of the micro part can realize the surface modification of a metal material, and can also clean the surface of a non-metal material, enhance the adhesive force and remove burrs.
5. According to the device for modifying the surface of the micro part, the vibration sheet horizontally moves through the roll-to-roll discharging module, so that a horizontal initial speed can be provided for a shot, the discharging compression roller and the receiving compression roller of the roll-to-roll discharging module can keep the vibration sheet in the working cavity to be straight, and the deformed vibration sheet can be pressed to be straight through the compression rollers, so that the repeated utilization is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of the apparatus for modifying the surface of a micro component according to the present invention.
Fig. 2 is a schematic structural diagram of a reinforcement module according to the present invention.
Fig. 3 is a three-dimensional schematic view of a reinforcement module according to the present invention.
Fig. 4 is a schematic three-dimensional sectional view of a reinforcement module according to the present invention.
In the figure:
1-a reinforcement module; 2-receiving press roller; 3-vibrating slice; 4, material collecting rolls; 5-water collecting tank; 6-a laser; 7-a mirror; 8-a laser beam; 9-a spray head; 10-a water pipe; 11-a water pump; 12-a water supply tank; 13-a computer; 14-material roll feeding; 15-discharging press rolls; 101-a workpiece to be strengthened; 102-a second upper gasket; 103-an upper cover; 104-a first fastening screw; 105-an intermediate housing; 106-lower cover; 107-second fastening screw; 108-shot; 109-a first lower gasket; 110-a second lower gasket; 111-first upper gasket.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
As shown in FIG. 1, the device for modifying the surface of a micro part comprises a strengthening module 1, a roll-to-roll vibrating piece module, a water supply module, a laser module and a computer 13.
As shown in fig. 2, 3 and 4, the strengthening module 1 comprises a housing comprising an upper cover 103, an intermediate housing 105 and a lower cover 106, and a projectile 108; one end of the middle shell 105 is connected with the upper cover 103 through a first fastening screw 104, the other end of the middle shell 105 is connected with the lower cover 106 through a second fastening screw 107, and the working cavity is a central hole which penetrates through the upper cover 103, the middle shell 105 and the lower cover 106; and a movable vibration piece 3 is arranged in one end of the working cavity, the vibration piece 3 is in a strip shape, and the material is stainless steel. A plurality of projectiles 108 are uniformly distributed on the vibrating plate 3, and a groove is arranged on the lower cover 106 and used for enabling the vibrating plate 3 to horizontally move. A workpiece 101 to be strengthened is arranged in the other end of the working cavity; two ends of the workpiece 101 to be strengthened are respectively arranged at the central hole of the upper cover 103 through a first upper gasket 111 and a second upper gasket 102; the vibrating plate 3 is located between the middle housing 105 and the lower cover 106, and a first lower gasket 109 and a second lower gasket 110 are respectively arranged on two sides of the vibrating plate 3. The strengthening module 1 is vertically arranged, so that the shots 108 in the initial stage are uniformly distributed on the upper surface of the stainless steel vibrating piece 3 under the action of gravity; the first upper gasket 111, the second upper gasket 102, the first lower gasket 109 and the second lower gasket 110 are all rubber flat washers; the number of the tiny pills 108 is 50, and the diameter is 0.08mm;
the roll-to-roll vibration sheet module is used for driving the vibration sheet 3 to move; the roll-to-roll vibrating piece module comprises a material discharging roll 14, a material receiving roll 4, a material discharging compression roller 15 and a material receiving compression roller 2, wherein the material discharging compression roller 15 and the material receiving compression roller 2 are positioned at two ends of a vibrating piece 3, and the material discharging compression roller 15 and the material receiving compression roller 2 are close to the shell and used for positioning the vibrating piece 3; the discharging roll 14 and the receiving roll 4 are used for enabling the vibrating sheet 3 to move, and the discharging roll 14, the receiving roll 4, the discharging compression roller 15 and the receiving compression roller 2 can also tension the vibrating sheet to enable the exposed part of the vibrating sheet to be straight, so that the deformed vibrating sheet can be flatly pressed and straightened through the pressing rollers, and recycling is achieved.
The water delivery module is used for forming a constraint layer on one side of the vibrating piece; the water delivery module comprises a spray head 9, a water pump 11, a water supply tank 12 and a water collection tank 5, the water pump 11 is positioned in the water supply tank 12, the spray head 9 is connected with the water pump 11 through a water pipe 10, and the spray head 9 is aligned to one side of the vibrating piece 3 away from the working cavity; the water collecting tank 5 is used for collecting water sprayed by the spray head 9. The water column sprayed by the spray head 9 forms an angle of 45 degrees with the vibrating sheet 3 to form a water curtain with the thickness of 2-3 mm.
The laser module is used for generating laser beams, and the laser beams 8 generated by the laser 6 are emitted to the vibrating plate 3 through the reflecting mirror 7. The laser 6 emits a laser beam 8 to irradiate the lower surface of the stainless steel vibrating piece 3 from bottom to top to generate shock waves, the shock waves are restrained by a water curtain sprayed by the spray head 9 to enable the stainless steel vibrating piece 3 to vibrate at a high speed, and the stainless steel vibrating piece 3 drives the tiny pills 108 in the working cavity 105 to continuously hammer the surface of the workpiece 101 to be strengthened at a high speed for modification treatment. The laser 6, the water pump 11 and the material placing coil 14 are electrically connected with a computer 13. The vibrating piece module continuously provides vibrating pieces for the strengthening module 1 under the control of the computer 13, and the automation of the modification process is realized.
The laser module generates a nanosecond pulse laser beam, the wavelength of the nanosecond pulse laser beam is 1064nm or 532nm, the diameter of a light spot of the nanosecond pulse laser beam is 1-3 mm, the pulse width of the nanosecond pulse laser beam is 10-20 ns, and the pulse energy of the nanosecond pulse laser beam is 5-10J. The thickness of the vibration piece 3 is 0.1-0.3 mm, and the movement speed of the vibration piece 3 is 0.5-5 mm/s.
It should be understood that although the specification has been described in terms of various embodiments, not every embodiment includes every single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole can be combined as appropriate to form additional embodiments as will be apparent to those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (4)

1. A device for modifying the surface of a micro part is characterized by comprising a strengthening module (1), a roll-to-roll vibrating piece module, a water feeding module and a laser module;
the strengthening module (1) comprises a shell and shots (108), a working cavity is arranged in the shell, a movable vibrating piece (3) is arranged in one end of the working cavity, a plurality of shots (108) are uniformly distributed on the vibrating piece (3), and a workpiece (101) to be strengthened is arranged in the other end of the working cavity; the roll-to-roll vibrating piece module is used for driving the vibrating piece (3) to move; the water delivery module is used for forming a constraint layer on one side of the vibrating piece; the laser module is used for generating laser beams, the laser beams penetrate through the constraint layer to impact the vibrating sheet (3), so that the vibrating sheet (3) generates vibration and is used for providing kinetic energy for the shot (108), and the shot (108) which obtains the kinetic energy is used for impacting a workpiece (101) to be strengthened; the housing comprises an upper cover (103), a middle housing (105) and a lower cover (106); an upper cover (103) and a lower cover (106) are respectively arranged at two ends of the middle shell (105), and the working cavity is a central hole which penetrates through the upper cover (103), the middle shell (105) and the lower cover (106);
two ends of the workpiece (101) to be strengthened are respectively installed at the central hole of the upper cover (103) through a first upper gasket (111) and a second upper gasket (102); the vibrating piece (3) is positioned between the middle shell (105) and the lower cover (106), and a first lower gasket (109) and a second lower gasket (110) are respectively arranged on two sides of the vibrating piece (3);
the roll-to-roll vibrating piece module comprises a material discharging roll (14), a material collecting roll (4), a material discharging compression roller (15) and a material collecting compression roller (2), wherein the material discharging compression roller (15) and the material collecting compression roller (2) are positioned at two ends of a vibrating piece (3), and the material discharging compression roller (15) and the material collecting compression roller (2) are close to a shell and used for positioning the vibrating piece (3); the material placing roll (14) and the material receiving roll (4) are used for moving the vibrating piece (3); the thickness of the vibrating sheet (3) is 0.1-0.3 mm, and the movement speed of the vibrating sheet (3) is 0.5-5 mm/s.
2. The device for surface modification of tiny parts according to claim 1, wherein said working cavity is a solid of revolution, and the moving direction of said vibrating plate (3) is perpendicular to the central axis of the working cavity.
3. The device for surface modification of the micro-parts according to claim 1, wherein the water delivery module comprises a spray head (9), a water pump (11), a water supply tank (12) and a water collection tank (5), the water pump (11) is positioned in the water supply tank (12), the spray head (9) is connected with the water pump (11), and the spray head (9) is aligned with one side of the vibrating piece (3) far away from the working cavity; the water collecting tank (5) is used for collecting water sprayed by the spray head (9).
4. The device for modifying the surface of the tiny part according to claim 1, wherein the laser module generates a nanosecond pulse laser beam, the wavelength of the nanosecond pulse laser beam is 1064nm or 532nm, the spot diameter of the nanosecond pulse laser beam is 1-3mm, the pulse width of the nanosecond pulse laser beam is 10-20ns, and the pulse energy of the nanosecond pulse laser beam is 5-10J.
CN202210069884.0A 2022-01-21 2022-01-21 Device for surface modification of micro parts Active CN114517252B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202210069884.0A CN114517252B (en) 2022-01-21 2022-01-21 Device for surface modification of micro parts
GB2319351.9A GB2621965A (en) 2022-01-21 2022-01-25 Micro-part surface modification device
PCT/CN2022/073621 WO2023137773A1 (en) 2022-01-21 2022-01-25 Micro-part surface modification device

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Application Number Priority Date Filing Date Title
CN202210069884.0A CN114517252B (en) 2022-01-21 2022-01-21 Device for surface modification of micro parts

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CN114517252A CN114517252A (en) 2022-05-20
CN114517252B true CN114517252B (en) 2023-02-17

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GB (1) GB2621965A (en)
WO (1) WO2023137773A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102925646A (en) * 2012-11-14 2013-02-13 江苏大学 Method and device of shot peening for surface of metal component by means of light-water complex
CN203955822U (en) * 2014-07-29 2014-11-26 江西晨宇铝业有限公司 Multi-functional aluminium strip process equipment
CN105222890A (en) * 2015-09-29 2016-01-06 刘张骞 Oscillatory type detector of laser energy
CN211089951U (en) * 2019-12-17 2020-07-24 褚建峰 Can change full frequency bone conduction loudspeaker of counter weight
CN112522487A (en) * 2020-11-11 2021-03-19 山东理工大学 Temperature-assisted ultrasonic shot blasting device and method
WO2021090043A1 (en) * 2019-11-04 2021-05-14 Ecole Polytechnique Federale De Lausanne (Epfl) Laser treatment systems and methods for in-situ laser shock peening (lsp) treatment of parts during production thereof by a selective laser sintering or melting (sls/slm) process, and additive manufacturing systems and methods implementing the same
CN112981090A (en) * 2021-02-04 2021-06-18 中国科学院力学研究所 Surface strengthening device and method based on laser-driven microparticle impact

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102925646A (en) * 2012-11-14 2013-02-13 江苏大学 Method and device of shot peening for surface of metal component by means of light-water complex
CN203955822U (en) * 2014-07-29 2014-11-26 江西晨宇铝业有限公司 Multi-functional aluminium strip process equipment
CN105222890A (en) * 2015-09-29 2016-01-06 刘张骞 Oscillatory type detector of laser energy
WO2021090043A1 (en) * 2019-11-04 2021-05-14 Ecole Polytechnique Federale De Lausanne (Epfl) Laser treatment systems and methods for in-situ laser shock peening (lsp) treatment of parts during production thereof by a selective laser sintering or melting (sls/slm) process, and additive manufacturing systems and methods implementing the same
CN211089951U (en) * 2019-12-17 2020-07-24 褚建峰 Can change full frequency bone conduction loudspeaker of counter weight
CN112522487A (en) * 2020-11-11 2021-03-19 山东理工大学 Temperature-assisted ultrasonic shot blasting device and method
CN112981090A (en) * 2021-02-04 2021-06-18 中国科学院力学研究所 Surface strengthening device and method based on laser-driven microparticle impact

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WO2023137773A1 (en) 2023-07-27
GB202319351D0 (en) 2024-01-31
CN114517252A (en) 2022-05-20
GB2621965A (en) 2024-02-28

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